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Grade 28 Titanium vs. ASTM A209 Steel

Grade 28 titanium belongs to the titanium alloys classification, while ASTM A209 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is grade 28 titanium and the bottom bar is ASTM A209 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 11 to 17
34
Fatigue Strength, MPa 330 to 480
180 to 200
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
73
Shear Strength, MPa 420 to 590
280 to 310
Tensile Strength: Ultimate (UTS), MPa 690 to 980
420 to 460
Tensile Strength: Yield (Proof), MPa 540 to 810
220 to 250

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 330
410
Melting Completion (Liquidus), °C 1640
1470
Melting Onset (Solidus), °C 1590
1420 to 1430
Specific Heat Capacity, J/kg-K 550
470
Thermal Conductivity, W/m-K 8.3
50
Thermal Expansion, µm/m-K 9.9
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.1 to 8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 36
2.4
Density, g/cm3 4.5
7.9
Embodied Carbon, kg CO2/kg material 37
1.5
Embodied Energy, MJ/kg 600
20
Embodied Water, L/kg 370
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 110
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 1370 to 3100
130 to 170
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 43 to 61
15 to 16
Strength to Weight: Bending, points 39 to 49
16 to 17
Thermal Diffusivity, mm2/s 3.4
13
Thermal Shock Resistance, points 47 to 66
12 to 14